Codecs Page 291 of 910
IP Line Description, Installation and Maintenance
For more information, see “Configure DSP profile data” on page 472.

Codec selection in Element Manager

Figure 59 shows the list of codec types that are displayed in Element
Manager.
Figure 59
Codec list in Element Manager
The G.711 and T.38 Fax codecs are automatically selected and cannot be
un-selected. Even though these codecs cannot be un-selected, the payload
size and the jitter buffer for G.711 can be changed. For G.711 Clear Channel,
only the jitter buffer can be changed.